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Conference napalm::guitar

Title:	GUITARnotes - Where Every Note has Emotion
Notice:	Discussion of the finer stringed instruments
Moderator:	KDX200::COOPER

Created:	Thu Aug 14 1986
Last Modified:	Fri Jun 06 1997
Last Successful Update:	Fri Jun 06 1997
Number of topics:	3280
Total number of notes:	61432

2659.0. "Amp external speaker jack installation?" by KNGBUD::DUBOIS (Bob Dubois LKG1-1/A15 226-7837) Tue Jan 12 1993 08:36

    I have a Peavey Bandit 65W. This amp has a single 12" speaker in the
    cab. 65W is more than sufficient to drive more speakers, but the amp
    does not have a jack for external speakers. My question is if I add
    a 1/4" jack can I splice into the wire that is coming out of the
    head now to the 12" speaker, or should I open the head and solder in
    a new set of wires from the original source for the jack. Are there
    any reasons I shouldn't do this at all? Are there any other things
    I would have to do other than splice/or run new lines to the jack.
    Any information/suggestions would be appreciated.
                              Thanks in advance!
                                    Bob

T.R	Title	User	Personal Name	Date	Lines
2659.1		FDCV09::GOODWIN		`Tue Jan 12 1993 10:14`	14
	It doesn't matter whether you splice into the wire or go into the amp. What does matter is that the total impedance load of all speakers is correct for the amp. For instance, if your current speaker is 4 ohms and you connect another 4 ohm speaker in parallel, you'd be running the amp at a 2 ohm load, which could fry it. If you connected the second speaker in a series circuit, the resulting load would be 8 ohms, which might (or might not) be o.k. for your amp. The fact that your amp has no external jack would lead me to believe that it is intended to work with the specific load of your current single speaker. /Steve
2659.2	Check impedence first	ABACUS::SANDER		`Tue Jan 12 1993 10:23`	12
	Better find out first if the power amp can drive a lower impedence than 8 ohms. You could try calling Daddy's Junky Music, as they sell lots of Peavey stuff, or call the Peavey factory. The number is; 1-800-821-2279 The Nashua Daddy's is 603-888-1160 That amp has a Scorpion loudspeaker in it, no? The Scorpion speakers have terminals that you push down on to insert the speaker wires. You should be able to daisy chain your new wires for the external jack from these terminals. Ed
2659.3		LEDS::ORSI	The Croco-Stimpy..HAPPY HAPPY!..JOY JOY!	`Tue Jan 12 1993 10:43`	14
	The Bandit 65 is 65 watts at 8 ohms. The total load of the cab shouldn't exceed 8 ohms, and that would give you a total of 4 ohms that the the amp sees. But, the Bandit isn't really designed for a 4 ohm load, but I know a few people who've done exactly what you propose, and haven't had any problems. A 4 ohm load could pose a problem if you play at high volume levels. The Bandit 65 doesn't have a very big heatsink to dissipate the extra heat generated by a 4 ohm load. From what I understand, the Peavey Special 130 is basically a Bandit 65 with a 4 ohm spkr, but it has a large external heatsink. I own a Bandit and have considered putting in an ext spkr jack myself. Neal
2659.4	thanks for your help	KNGBUD::DUBOIS	Bob Dubois LKG1-1/A15 226-7837	`Tue Jan 12 1993 10:58`	8
	Thanks for the quick responses. I called the factory number #2 provided and spoke to an engineer who recomended not doing it. He said the amp would run at 4 ohms, but it would heat the circuitry which would probably shorten the life of the amp. So I guess I'll leave the amp as is. Thanks!
2659.5		NEEPS::IRVINE	SoldMySoulFerASausageRoll	`Wed Jan 13 1993 03:27`	6
	re: .3 The Peavey Special 130 claims on the backplate to be a 300W Instrument AMP, and has an additional speaker socket on the back.... Bob
2659.6	Hmmmm... that rig must be hotfooted... COOL!	FRSBEE::ABATELLI	Who knew?	`Fri Jan 15 1993 04:46`	7
	RE: 2659.5 A PV SPECIAL 130? The 300W = power consumption not speaker wattage. The Special 130 (I thought) runs around 130 watts with a 4 ohm load. No big thang, just a "minor" nit. Rock on, Fred (who has a PV-MX combo that kicks out 130+ watts with an EVM)